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3. Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Derivatives, Fair Value [Line Items] |
Unrealized loss on contracts maturing in April through June 2015 to sell foreign currency | $ 0.8 bio_UnrealizedLossGainOnForeignCurrencyDerivativeSaleContracts
Unrealized gain on contracts maturing in April through June 2015 to purchase foreign currency | 0.7 bio_UnrealizedLossGainOnForeignCurrencyDerivativePurchaseContracts
Forward foreign exchange contract to sell foreign currency [Member] |
Derivatives, Fair Value [Line Items] |
Notional value | 75.6 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = bio_ForwardforeignexchangecontracttosellforeigncurrencyMember
Forward foreign exchange contract to purchase foreign currency [Member] |
Derivatives, Fair Value [Line Items] |
Notional value | $ 262.3 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = bio_ForwardforeignexchangecontracttopurchaseforeigncurrencyMember

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- Definition Unrealized Loss (Gain) on Foreign Currency Derivative Purchase Contracts + References No definition available. + Details
Name: | bio_UnrealizedLossGainOnForeignCurrencyDerivativePurchaseContracts
Namespace Prefix: | bio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Unrealized Loss (Gain) on Foreign Currency Derivative Sale Contracts + References No definition available. + Details
Name: | bio_UnrealizedLossGainOnForeignCurrencyDerivativeSaleContracts
Namespace Prefix: | bio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bio_ForwardforeignexchangecontracttopurchaseforeigncurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bio_ForwardforeignexchangecontracttosellforeigncurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |